|Team #1|Agg.|Team #2|1st leg|2nd leg|
|---|---|---|---|---|
|Florina|0-3|Panachaiki|0-1|0-2|
|Kilkisiakos|1-2|Panarkadikos|1-0|0-2|
|Kallithea|2-7|Makedonikos|2-2|0-5|
|Panathinaikos|9-1|Panelefsiniakos|5-0|4-1|
|Anagennisi Arta|1-6|Olympiacos|1-1|0-5|
|PAOK (a.g.)|3-3|Aris|2-0|1-3|
|Kavala (a.g.)|2-2|Aiolikos|1-0|1-2|
|Kozani|2-1|Fostiras|1-0|1-1|
|Diagoras|3-4|Korinthos|2-2|1-2|
|Larissa|8-1|Neapoli Piraeus|7-0|1-1|
|Thiva|2-3|Proodeftiki|1-1|1-2|
|Edessaikos|1-2|Levadiakos|1-0|0-2|
|Pierikos|2-1|Ethnikos Asteras|2-0|0-1|
|Ethnikos Olympiakos Volos|2-1|Thriamvos|2-1|0-0|
|Lamia|4-3|Kastoria|4-2|0-1|
|Panionios|3-1|PAS Giannina|3-1|0-0|

Question: how many times was the score 1-0 in the 1st leg?
Answer: 4